I believe that unfourtunatly Snape was on the "dark side" the whole time. As much as I hate to admit it, we cannot just assume that Dumbledore told him to kill him, because apparently Dumbledore did not know of the Unbreakable Curse that was put upon him, so therefore. . . . I think he's evil. Your opinions may differ, but I don't think there is anyway around it. We can only hope I suppose.
Charming-Lynn: Huh? I think Snape is EVIL, he only saw Dumbledore as using him for a teacher to fill in the holes in the lack of staff, and as a spy for information. Not as a friend. I know, I am extremelly angry with Snape also.
Emerald-Dragoness: Thank you for your kind review, umm I completely agree with you. I didn't like reading the ones where somehow Snape was only obliged tto kill Dumbledore.
I CRIED SO MUCH AFTER I READ THOSE WORDS!